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United States Patent | 5,791,245 |
Schnyder ,   et al. | August 11, 1998 |
A pressure roll having a fixed carrier and a rotating elastically deformable roll jacket that cooperates with a counter-roll and that is supported on the carrier via a hydrostatic support arrangement. The roll jacket has an inner surface that is movably guided in the peripheral direction over a concave support surface. The roll jacket is executed with a wall that is flexible in the radial direction and can conform to the counter-roll over a pressure zone whose width dimension in the peripheral direction is adjustable within a range of at least 8 mm to circa 40 mm. Furthermore, the roll jacket consists at least partially of an electrically conductive material in order to prevent an uncontrolled electrostatic charging of the jacket surface.
Inventors: | Schnyder; Eugen (Waltenschwil, CH); Machguth; Guenter (Wuerenlos, CH); Gasser; Egon (Winterthur, CH) |
Assignee: | De Pretto-Escher Wyss S.R.L. (Schio, IT) |
Appl. No.: | 765810 |
Filed: | January 3, 1997 |
PCT Filed: | May 3, 1996 |
PCT NO: | PCT/CH96/00168 |
371 Date: | January 3, 1997 |
102(e) Date: | January 3, 1997 |
May 05, 1995[CH] | 1299/95 |
Current U.S. Class: | 101/153; 492/7 |
Intern'l Class: | B41F 009/00 |
Field of Search: | 101/152,153,216,348 492/2,4,7,5,16,17,18,54,20,57,6 100/163 R,164,162 B,118,153 |
4188874 | Feb., 1980 | Heuss | 101/153. |
4503769 | Mar., 1985 | Andersen | 101/153. |
4518460 | May., 1985 | Hauser. | |
4570314 | Feb., 1986 | Holik et al. | 492/4. |
Foreign Patent Documents | |||
0 698 684 | Feb., 1996 | EP. | |
2 310 882 | Dec., 1976 | FR. | |
3338487 A1 | May., 1985 | DE. | |
1135901 | Dec., 1968 | GB. |
Patent Abstracts of Japan, vol. 12, No. 45 (M-667), Feb. 10, 1988 & JP,A,62 196189 (Showa Denko), Aug. 29, 1987, cf. Abstract. Patent Abstracts of Japan, vol. 95, No. 5, Jun. 30, 1995 & JP,A,07 042728 (Tokai Rubber), Feb. 10, 1995, cf. Abstract. |